Problem: You are given three numbers. Is there a way to replace variables A, B and C with these numbers so the equality A + B = C is correct?

Input:

There are three numbers X1, X2 and X3 (1 ≤ Xi ≤ 10^100), each on a separate line of input.

Output:

Output either "YES", if there is a way to substitute variables A, B and C with given numbers so the equality is correct, or "NO" otherwise.

Sample Input:

1

2

3

Output:

YES

Sample Input:

1

2

4

Output

YES

Sample Input:

1

3

5

Output

NO

SAMPLE INPUT
1
2
3

SAMPLE OUTPUT
YES

Solution (in PYTHON):

Solution:
a=[]
a.append(input())
a.append(input())
a.append(input())
a.sort()
if a[0]+a[1]==a[2]:
	print "YES"
elif a[0]+a[0]==a[1]:
	print "YES"
elif a[0]+a[0]==a[2]:
	print "YES"
elif a[1]+a[1]==a[2]:
	print "YES"
else:
	print "NO"